少刺型黄瓜新品种中农9号的选育     

顾兴芳  方秀娟  张天明 《中国蔬菜》2002,1(6):23-25

中农 9号黄瓜是用自交系 183和 185配制而成的少刺、短瓜型高产多抗一代杂种。中早熟 ,生长势强 ,耐低温弱光性好。抗黑星病、枯萎病、细菌性角斑病 ,中抗霜霉病等。每 6 6 7m2 产量 75 0 0～ 15 0 0 0kg。适宜日光温室、春棚及秋棚延后栽培 ,以日光温室越冬嫁接栽培效果最好。已在山东莱西、莱阳、青岛、寿光及江苏等地推广 10 0 0hm2 以上。  相似文献   

A unique intraorbital osseous structure in the large fruit-eating bat (Artibeus lituratus)     

Machado M  dos Santos Schmidt EM  Margarido TC  Montiani-Ferreira F 《Veterinary ophthalmology》2007,10(2):100-105

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Thoracolumbar myelopathies in pug dogs     

Ian J. Wachowiak  Jon S. Patterson  Kathryn M. Winger  Kathleen L. Smiler  Robert Cole  Rachel Moon  Michael Kluz  Lisa R. Bartner 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2023,37(2):618-625

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黄瓜果实黑刺基因B2的遗传分析和定位     

陈龙  杜慧  李恒松  潘俊松  何欢乐  蔡润 《上海交通大学学报(农业科学版)》2016,(5):35-40

以黄瓜黑刺自交系PI197088(P1)和白刺自交系SA0422(P2)为亲本构建的592株F2群体为材料,对黄瓜果实黑刺基因B2进行定位研究。采用以下方法:(1)遗传分析:性状调查结果为F2群体中黑刺株与白刺株的分离比为9∶7,初步判定黑刺性状由2对基因控制。(2)测序比对:比对亲本中的黑刺基因B(Csa4G003095),发现SA0422的B基因转录区存在单碱基突变,引起转录本拼接异常,导致编码产物出现18个氨基酸的缺失。(3)基因分型:用与B基因紧密连锁的SSR标记分析表型为白刺的单株,结果呈现3种不同的基因型,推测在PI197088和SA0422及其后代群体中,果实黑刺性状由B基因和另一个基因(命名为B2)共同控制。(4)基因定位:利用该F2群体,通过分离群体分组分析法(bulked segregant analysis,BSA),筛选获得与B2基因连锁的SSR标记5个,构建了B2基因的SSR标记连锁群。得到以下分析结果:研究分析表明黄瓜果实黑刺由2对基因(B和B2基因)控制,本研究将B2基因定位于黄瓜第5号染色体上,与两侧最近的连锁标记(SSR13237和SSR03514)的遗传距离分别为12.94和2.42cM,这些结论为后续的B2基因精细定位奠定了基础。  相似文献   

中国海域棘头梅童鱼头棘和鳞片轮纹形态的初步研究(英文)   总被引：1，自引：0，他引：1  

江艳娥  林昭进  邱永松  方展强 《江西农业学报》2012,(4):157-159,162

对采自上海和广州的36尾棘头梅童鱼的外部形态学进行了分析,探讨了其头部头棘和鳞片鳞嵴这两个外部形态特征与该种类其他特征之间的关系。采用线形回归法分析了17个可量性状和8个可数性状。结果表明:头部头棘的特征与背鳍前长、眼间距两个特征之间存在更紧密的联系,而鳞片鳞嵴与下鳃耙数量、眼间距两个特征之间存在更紧密的联系。  相似文献   

黄颡鱼毒棘结构研究     

冯晓玉  肖瑾  吴邦元  曾燏  杜涌徽  张富斌 《水产学报》2024,48(6)

黄颡鱼（Pelteobagrus fulvidraco）是较为典型的淡水刺毒鱼类,本研究结合宏观毒棘骨骼标本制作和微观组织切片等方法,深入探究黄颡鱼的毒棘结构。研究结果表明,黄颡鱼的胸鳍和背鳍均具有尖锐的倒刺棘骨,棘骨外包围着皮膜,皮膜拥有能分泌毒液的毒腺细胞,它们共同组成了黄颡鱼毒棘装置。毒棘骨骼宏观结构表明,黄颡鱼的背鳍和胸鳍毒棘均具有贯穿全棘骨的中央管和包围棘骨的皮膜;背鳍棘骨细长、锥形,且轻微拱起,顶部骤尖,后缘为弱锯齿;胸鳍棘骨前后缘均有锯齿,但后缘为强锯齿。背鳍和胸鳍毒棘基部结构的髁突形状、大小、位置全然不同。微观结构显示,皮膜中的毒腺细胞聚集成层,位于鳞状上皮与色素层之间,未见导管与之相连,背鳍和胸鳍毒棘的分支性骨管中均未发现毒腺细胞。胸鳍和背鳍锁紧装置可让毒棘保持倒伏或者直立的锁定状态,降低猎物挣脱几率。本研究可深入了解黄颡鱼的毒棘结构和特征,增强人们对刺毒鱼类的认知,同时为淡水刺毒鱼类深入研究奠定基础。  相似文献   

德州驴生产性能的初步研究     

高琦璨  王金鹏  李玉华  孙艳  杨春红  李海静  贾涛  刘桂芹  王长法 《家畜生态学报》2021,(2):56-61

德州驴是优秀的皮肉兼用驴,包括“三粉驴”和“乌头驴”两个品系,但是关于德州驴的研究较少.为了向驴产业提供可靠的德州驴生产性能数据,该研究以40头三粉驴和9头乌头驴为研究对象,系统研究了德州驴的体尺性状、屠宰性能、脏器系数及胸腰椎数等性状特点.结果 表明,三粉驴的屠宰率为54.02％,净肉率为42.43％,净皮率为8.1...  相似文献   

ULTRASONOGRAPHIC TECHNIQUE AND NORMAL ANATOMIC FEATURES OF THE SACROILIAC REGION IN HORSES     

EMMANUEL ENGELI  AMY E. YEAGER  HOLLIS N. ERB  KEVIN K. HAUSSLER 《Veterinary radiology & ultrasound》2006,47(4):391-403

The purpose of this study was to establish the normal percutaneous ultrasonographic appearance of anatomic structures within the equine sacroiliac region. Percutaneous ultrasonography was performed in a cranial-to-caudal direction in 10 normal adult live horses. The following structures were examined in detail: supraspinous ligament, lumbar and sacral spinous processes, thoracolumbar fascia and its caudal extension, tubera sacralia, ilial wings, dorsal and lateral portions of the dorsal sacroiliac ligaments, lateral part of the sacrum, and the lateral sacral crest. After ultrasonography, all animals were euthanized and detailed dissection of the lumbosacropelvic region was performed in six horses. Four lumbosacropelvic specimens were frozen and sectioned transversely for evaluation of cross-sectional anatomy. Gross anatomic findings were correlated with ante-mortem ultrasonographic images. On percutaneous ultrasonography, all horses had tubera sacralia with a mild-to-moderate roughened surface with occasional irregular hyperechoic mineralizations located within the apophyseal cartilage of younger horses. At the level of the tuber sacrale the caudal extension of the thoracolumbar fascia joined the dorsal portion of the dorsal sacroiliac ligament and assumed two different configurations relative to the dorsal portion of the dorsal sacroiliac ligament, with the predominant configuration of the thoracolumbar fascia located medial to the dorsal portion of the dorsal sacroiliac ligament. The less frequently encountered configuration had the thoracolumbar fascia positioned dorsal to the dorsal portion of the dorsal sacroiliac ligament. Caudal to the tuber sacrale the dorsal portion of the dorsal sacroiliac ligament and thoracolumbar fascia consolidated to form a single, fused structure with a common insertion on the sacral spinous processes. A large variability in linear fiber pattern, echogenicity (small focal hypoechoic areas), ligament height, and cross-sectional measurements was identified in the fused dorsal portion of the dorsal sacroiliac ligament and thoracolumbar fascia of normal horses. Diagnosing mild-to-moderate desmitis of the fused dorsal portion of the dorsal sacroiliac ligament and thoracolumbar fascia based solely on ultrasonography may therefore be difficult. To correlate ultrasonography with histology, samples of a fused dorsal portion of the dorsal sacroiliac ligament and thoracolumbar fascia with bilateral hypoechoic lesions were submitted for histology and revealed diffuse mild-to-moderate loss of fiber density, multifocal fibrocyte degeneration, and cartilagenous metaplasia with multifocal, mild myofiber mineralization, which was compatible with age-related changes. As controls, sections of ultrasonographically normal fused dorsal portion of the dorsal sacroiliac ligament and thoracolumbar fascia from three horses demonstrated similar but milder histologic findings, which were considered normal.  相似文献   

An investigation into the relationship between equine behaviour when tacked-up and mounted and epaxial muscle hypertonicity or pain,girth region hypersensitivity,saddle-fit,rider position and balance,and lameness     

S. Dyson  A. Bondi  J. Routh  D. Pollard 《Equine Veterinary Education》2022,34(6):e258-e267

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Description of a novel ultrasound-guided approach for a dorsal quadratus lumborum block: a canine cadaver study     

《Veterinary anaesthesia and analgesia》2022,49(1):118-125

ObjectiveTo describe an ultrasound-guided approach to the dorsal aspect of the quadratus lumborum muscle (D-QL) and to evaluate the spread of methylene blue dye in canine cadavers.Study designProspective, experimental anatomical study.AnimalsA total of 12 canine cadavers.MethodsThe ultrasonographic landmarks and injection technique for the D-QL approach were determined in two cadavers. Correct needle tip position was confirmed by computed tomography. Bilateral ultrasound-guided injections were performed in 10 cadavers between the QL muscle, the vertebral body and the ventrocaudal aspect of the transverse process of the first lumbar vertebra (L1) using two volumes of methylene blue: low volume (LV) 0.3 mL kg^–1 or high volume (HV) 0.5 mL kg^–1. Staining of the main thoracolumbar trunk, dorsal and ventral branches of the thoracic (T) and lumbar (L) spinal nerves, sympathetic trunk and epidural space were assessed following dissection. Data between groups were compared using Mann–Whitney U test. Data are presented as median (range).ResultsThe ventral branches of spinal nerves T12, T13, L1, L2, L3 and L4 were stained in 10%, 70%, 100%, 90%, 60%, 0% and 30%, 100%, 100%, 100%, 50% and 30% after LV and HV injections, respectively. Multisegmental spread of the sympathetic trunk was found on 3 (3–4) and 5 (3–6) vertebral spinal levels following LV and HV injections, respectively (p = 0.005). The T13 segment of the sympathetic trunk was stained after all HV injections. Epidural spread was found in 20% and 30% of LV and HV injections, respectively.Conclusions and clinical relevanceThe injection of HV versus LV dye using the D-QL approach provided more consistent staining of the thoracolumbar nerve structures which innervate the abdominal wall and viscera. Clinical studies are required to evaluate the analgesic efficacy of the D-QL block for abdominal procedures in dogs in vivo.  相似文献